promql query to compare to global avg

gistfile1.txt

# take the sum of the rate, leave stuff in irrelevant labels alone
# maybe use delta instead of rate to make it sign-aware
sum without (stuff) (rate($metric[1d]))
> 
# ignore the instance on this side of the compare, would be even better without the instance of interest
ignoring (instance, stuff) group_left()
(
avg without(instance, stuff)(rate($metric[1w]))
+
# just give that some more breathing room
2 * stddev without(instance, stuff)(rate($metric[1w]))
)

# maybe fiddle with the 1d/1w part, larger difference in time scope makes this more aggressive, in theory


# Once more, but readable:
sum without (stuff) (rate($metric[1h]))
> ignoring (instance, stuff) group_left()
(
avg without(instance, stuff)(rate($metric[1w]))
+
2 * stddev without(instance, stuff)(rate($metric[1w]))
)